Two carts are traveling at the same speed in the same direction. The first cart's speed doubles in a specified time. The second cart's speed doubles in twice that time. The magnitude of the average acceleration of the first cart is greater than the magnitude of the average acceleration of the second cart.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.